Men are attracted to fit, young females. Maybe because women in the past tended to pick not the youngest but the most powerful (in this particular social circle?). Thus humans learned that both parties are ok with age difference.
It seems a bit gross, a 70yo with a 25yo girl. It happens less often now (a wild guess), so maybe social pressure helps a little bit. But i believe that men still prefer fitness over education in women. Not 100% of the time, not in edge cases, but in general. Even in the press, a guy is more often smart, funny, successful and a girl is beautiful, elegant, and so on. Not always, but more often than not.